Specifications

Type: 4-Stroke single-cylinder OHC air cooled

Bore & Stroke: 54 X 54mm

Compression ratio: 9.47:1

Displacement: 123.7cc

Max. HP: 8.72 HP @ 7,500 RPM

Max. Torque: 8.0N.m @ 5,500 RPM

Idle: 1,500 RPM

Starter: Kick Start

plug: A7TC or C6HSA

Plug Gap: .28 or 0.6-0.8mm

Ignition system: CDI (Capacitive Discharge Ignition)

Lubrication: Pressure / Splash

Oil capacity: 0.9L (15w/40-SE)

Measurements: 18 1/4" x 11" x 11"

Weight: 44.1/4 lbs (Engine only) Shipped 52lbs

Clutch: manual clutch-wet

Gears: 4 speed (primary reduction: 3.722 manual, 4.059 Auto)

Gear Ratios: 2.833/1.706/1.238/0.958

Magneto: Permanent magnetic

Voltage: 12 V

Sprocket: 428 15T 17mm

All machines do not carry oil

Fitment:

For HONDA CRF50 / CRF70 / XR50 / XR70 / Z50 / Z50R / CT70 Mini Trail / Z50 / Minitrail Monkey / XL70 ST70 / QA50 / QR50 / CL70 / SL70 / 70 Passport / ST 90K2 / ST 90K1 / CS 90 / SL 90 / ZB 50

Please note this is not a guarantee, if you are unsure, please ask your local dealer.

This engine has a three disc crank mounted heavy duty manual clutch. The head has a large domed combustion chamber with large valves. The intake valve is 27mm exhaust valve is 23mm.
This engine must be a neutral to start with a kick starter.

This engine does not come equipped with an ignition system (CDI). Additionally, all engines undergo an oil-draining process before leaving our factory. Therefore, without an ignition system and with no oil remaining inside the engine, you will need to add engine oil (4T oil) during the initial setup after purchase.